Tsujinaka-chan is an office worker who has always been in love with her senpai. One day, when her senpai’s girlfriend breaks up with him, Tsujinaka invites him to drink alcohol to comfort him. After drinking, she proposes to her senpai to be his girlfriend and tricks him into going to a love hotel.

容貌端丽成绩优秀的学生会长樱泽友美有个秘密，她天生就能分泌母乳。为了帮助因胸部充满母乳而困扰的女子学生，她进行了一项梦幻般的母乳性爱活动：透过饮用精液来大量分泌母乳荷尔蒙，并透过搾乳性爱来挤乳汁，直到母乳被挤乾为止！

Yuka, a girl who suffers from social isolation at school, has a secret: she is an online erotic streaming star, concealing her identity with a mask. One day, she finds what appears to be a love letter in her locker, but it actually contains screenshots from her streams. The man behind the letter blackmails her, threatening to expose her identity unless she complies with his demands.

这是一个关于被四十亿夏娃追求的唯一一个亚当的故事。在一场大流行病中，所有人类都变成了ED（勃起功能障碍），但男学生一树成为了唯一一个免于ED的特殊存在。如果被发现，他将会被当作实验动物一辈子……他不想这样！明明必须保守秘密，他却转学到了一个意想不到的地方，一个全是女生的后宫学园!?友好且随和的前辈，欲求不满的女教师，学园的王子，财阀的千金小姐，一樹能够吸引任何女性。究竟一树会选择谁——